Access Restriction Bypass Affecting krb5 package, versions <1.12.1+dfsg-20


Severity

0.0
medium
0
10

    Threat Intelligence

    EPSS
    0.43% (75th percentile)

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  • Snyk ID SNYK-DEBIAN10-KRB5-395839
  • published 25 May 2015
  • disclosed 25 May 2015

How to fix?

Upgrade Debian:10 krb5 to version 1.12.1+dfsg-20 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5 package and not the krb5 package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.

CVSS Scores

version 3.1
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Snyk

5.4 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    None
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NVD

5.4 medium
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Red Hat

5.4 medium